I think you will have to use the ladder method
Answer:
D. A line that shows only one solution to the equation
24 kg
Step-by-step explanation:
You start by calculating the linear mass density of the rod:
d = m/L = (40 kg)/(5 m) = 8 kg/m
So for a 3-m long bar, the mass can be calculated as follows:
m = d×L = (8 kg/m)(3 m) = 24 kg
